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authorVincent Ambo <tazjin@google.com>2020-05-20T21·58+0100
committerVincent Ambo <tazjin@google.com>2020-05-20T21·58+0100
commit43677021e3c285c2ced2075b918da947e13fcb00 (patch)
tree261d2ecbc6a9492d6410f9f4e8fd6629f20b49e6 /third_party/nix/src/libutil/args.cc
parent689ef502f5b0655c9923ed77da2ae3504630f473 (diff)
refactor(3p/nix): Apply clang-tidy's performance-* fixes r/789
This applies the performance fixes listed here:

https://clang.llvm.org/extra/clang-tidy/checks/list.html
Diffstat (limited to 'third_party/nix/src/libutil/args.cc')
-rw-r--r--third_party/nix/src/libutil/args.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/libutil/args.cc b/third_party/nix/src/libutil/args.cc
index 2b4407480254..48fa715fdf0f 100644
--- a/third_party/nix/src/libutil/args.cc
+++ b/third_party/nix/src/libutil/args.cc
@@ -175,7 +175,7 @@ Args::FlagMaker& Args::FlagMaker::mkHashTypeFlag(HashType* ht) {
   arity(1);
   label("type");
   description("hash algorithm ('md5', 'sha1', 'sha256', or 'sha512')");
-  handler([ht](std::string s) {
+  handler([ht](const std::string& s) {
     *ht = parseHashType(s);
     if (*ht == htUnknown) {
       throw UsageError("unknown hash type '%1%'", s);